Volvo Owners Club Forum - View Single Post - S40 V40:

Richierich73 · Apr 23rd, 2017, 17:55

Hi, I have searched and read a few posts on this, but they are mostly related to diesel engines.

Car: 2002 V40 1.8i Petrol 122bhp

My problem: After returning from a 2 week holiday, someone had tried to break into my V40, and as a result, the alarm flattened the battery. The battery completely died and would not re-charge, so I have replaced it, but now the engine will not idle very well. It stalls after revving, and during idling it raises and drops engine speed.

I have seen posts relating to Idle control valves and others about the ECU resetting due to the battery change, but I am not sure which is applicable to my engine.

Any help will be gratefully received.

Thanks, Richard

Apr 23rd, 2017, 17:55	#1
Richierich73 New Member Last Online: Nov 5th, 2017 11:21 Join Date: Dec 2015 Location: Portsmouth	Poor idle after battery change Hi, I have searched and read a few posts on this, but they are mostly related to diesel engines. Car: 2002 V40 1.8i Petrol 122bhp My problem: After returning from a 2 week holiday, someone had tried to break into my V40, and as a result, the alarm flattened the battery. The battery completely died and would not re-charge, so I have replaced it, but now the engine will not idle very well. It stalls after revving, and during idling it raises and drops engine speed. I have seen posts relating to Idle control valves and others about the ECU resetting due to the battery change, but I am not sure which is applicable to my engine. Any help will be gratefully received. Thanks, Richard